Tool-holder



' (No Model 7 W. S. SHERMAN-.-

TOOL HOLDER. I I No. 577,075. v Patented Feb. 16, 1 89 7.

I UNIT D STATES PATENT OFFICE.

WILLIS S. SHERMAN, OF MILVVAUKEE,WISCONSIN.

TOOL-HOLDER.

SPECIFICATION forming part of Letters Patent No. 577,075, dated February16, 1897.

Application filecl A ril 6, 1896.

To all whom it may concern:

Be it known that I, WILLIS S. SHERMAN, of Milwaukee, in the county ofMilwaukee and State of Wisconsin, have invented a new and usefulImprovement in Tool-Holders, of which the following is a description,reference being had to the accompanying drawings, which are a part ofthis specification.

My invention is of improvements in a toolholder adapted for use with alathe.

The object of the invention is to provide means (usually in connectionwith a tool-post holding a tool of the common form) adapted to receiveat different times tools of varying sizes in cross-section, but of ahomogeneous form, and center each tool in a common plane, though ofdifferent sizes, and preferably to hold thetool in a plane with thestock or chuck centers of the lathes and in a plane parallel with theways or line of travel of the slide or tool-post support andin a more orless extended position from the supporting device, so as especially toadapt it for boring, turning, drilling, cutting threads, &c., bothinside and outside work. This construction obviates the necessityforkeeping on hand a large number of tools of the same diameter for worknear to or more distant from the tool-holder, as this device takesequally well tools of difierent diameters.

The invention also includes means for holding a plurality of tools, thusproviding for both boring and facing material or doing analogous workwithout having to remove and replace or change tools.

The invention consists of the devices and their parts and combinationsof parts hereinafter described and claimed or their equivalents.

In the drawings, Figure 1 is an elevation of my improved tool-holdershown in connection with a fragment of the slide of the tool-carriage onwhich slide my tool-holder is mounted. Fig. 2 is an elevation of myimproved tool-holder as seen at a right angleto the elevation shown inFig. 1, centers of the chucks or stocks of the lathe being shown inconnection therewith to show the relation of Fig. 3 is a plan View ofthe tools thereto.

my improved tool-holder in connection with a metal block or article insection, a central aperture in which block is being enlarged by SerialNo. 586,336. (No model.)

one of the tools in the holder, thereby showing a method of theoperation of the tool in connection with my holder. Fig. 4 is anothertop plan View of my improved holder in connection with a block ofmaterial, showing the operation of my improved device in anotherposition and as used for planing a surface. Fig. 5 shows fragmentaryparts of the tools as they may be held in my improved holder, inconnection with a block of material, illustrating the manner of reamingor countersinking an aperture in the material.

In the drawings, A is the slide of a tool-carriage of a lathe. Thisslide is provided with transverse ways B therein. A block 10 is fittedand travels in the ways B. A tool-post 11 is provided with an enlargedfaced or rectangular foot 12, that fits in a suitable recess therefor inthe under side of the block 10, through which block the tool-postextends upwardly, the tool-post being thus secured in the block. Thetool-post and block, which block is itself essentially the foot ofthetoolpost, are adjustable on the slide in the ways therefor in whichthe post and block are fitted.

The tool-post 11 is provided with the diametrically-extending elongatedslot 13, adapted to receive the tool 14 therein. A bolster 15,preferably of segmental form, is preferably provided, which is insertedin the slot 13 for supporting the tool 14 thereon. The curved surface ofthe bolster rests movably upon the correspondingly-curved surface of themember 17, hereinafter described. By means of the curved bolster 15 andthe length of the slot 13 the tool 14 may be tilted slightly upwardly ordownwardly, as desired. A holding-screw l6, turning into the outer endof the post 11, is adapted to turn against the tool 14 and thus clampthe parts together and to the slide A.

In connection with the tool-post 11 I pro- .vide an auxiliarytool-holder in the form of a tool-post arm 18. This tool-post armcomprises a member 17, which rests on the slide A, so as to swivel aboutthe tool-post 11, and

a member 19, projecting laterally therefromand provided with alaterally-elongated slot 20, the inner end of which is V-shaped, theangle of which is preferably disposed in the plane of the chuck orstockcenters 21 and is parallel with the ways or line of motion of thepost-supports. A movable jaw 22is inserted and travels on ways in theslot 20 toward and from its front V-shaped end or stationary jaw, thejaw 22 being provided with a complementary V-shaped inner end oppositethe stationary V-shaped jaw of the inner end of the slot 20. A set-screw23, turning into the member 10, bears against the movable jaw 22, theconstruction being adapted to clamp a tool 24 in the tool-post arm 18.The disposition of the parts is such that a tool having a round, square,or octagonal body or shank homogeneous throughout its length will beautomatically centered, preferably in the plane of the chuck-centers 21and travel of the post-support when inserted in the tool-post arm 18 bythe action of the jaws bearing against it when being clamped in thetool-arm. The form of the jaws may be changed to adapt them to toolshaving bodies or shanks of other forms in cross-section, as triangular,hexagonal, or the like.

The drawings Figs. 3, 4, and 5 illustrate different methods of using thetool-holder, Fig. 3 showing the tool 24 in the act of enlarging anaperture in an article (3, Fig. 4 showing the tool-holder with the arm18 011 the other side of the tool-post 11 from that shown in Fig. 3 andthe tool 24 as in the act of facing the surface of the block 0, while inFig. 5 the tool 14 is shown as reaming out or countersinking theaperture in the block 0, the tool 24 having been withdrawn rearwardly inthe tool-holder therefor.

The bolster 15 is not a necessary part of the construction, as thebolster may be removed and the tool 14 be permitted to rest and beardirectly on the member 17. In fact, for the mere purpose of securing thearm 18 to the slide A, the tool 14 may also be removed and a key or mereblock of iron may be inserted in the tool-post in its place to take thethrust of the holding-screw 16 and hold the member 17 to the slide.

That I claim as my invention is 1. A tool-holder for a lathe, comprisinga tool-post and a tool-post arm arranged to swivel about the tool-post,andmeans for clamping the tool-post and tool-post arm to their support.

2. The combination of a tool-post movable in its support, the support, atool-post arm resting on the support and swiveling about the tool-post,a bolster and a tool in the toolpost, and means for clamping thetool-post and the arm to the support.

3. The combination with a support and a v tool-post thereon, of atool-post arm swiveling about the post, means for clamping the tool-postand the arm to the support and the tool-post, a tool or its equivalenton the tool-post and means for clamping the toolpost. the tool, and thetool-post arm to the support.

6. A tool-holding device comprising a toolpost, a tool-post arm,swiveling about the toolpost and having a jaw or jaws and means forclamping the tool thereto, so that tools of different sizes and formsmay at will be inserted and clamped therein in such manner that the axisof the tool will be in a predetermined horizontal plane parallel withthe ways of the tool-support and at a right angle to a radius from theaXis of the tool-post arm.

In testimony whereof I aiiix my signature in presence of two witnesses.

WILLIS S. SHERMAN.

Witnesses:

O. '1. BENEDICT, A. L. MoRsELL.

